Rotary drill-bit for oil-wells.



W. M. KEGK.

ROTARY DRILL BIT FOR OILWELLS.

APPLICATION FILED MAR.11,1914. I

Patented Jan. 19, 1915.

v {ms/1m IIE'l/z'am M laela ufmnnn's 1, I r 1 .wlllllllllllllkp ll l l zf 1 WITIE88E8 WILLIAM M. KECK, F COALINGA, CALIFORNIA.

ROTARY DRILL-BIT FOR OIL-WELLS.

Specification of Letters Patent.

Patented Jan. 19, 1915.

Application filed March 11, 1914. Serial No. 823,935. 1

To all whom it may concern:

Be it'lrnown that I, WILLIAM M. Knox, a

citizen of the United States, and a resident of Coalinga, in the countyof Fresno and State of California, have invented a new and ImprovedRotary Drill-Bit for Oil-' Wells, of which the following is a full,clear, and exact description.

This invention relates to deep well boring or drilling apparatus, andhas particular reference to means for boring rapidly through variouscharacters of earth or rock.

Among the objects of the inveption, more specifically stated, is toprovide a drill bit, preferably of the fish tail form, adapted tooperate rapidl and without clogging through soft, stlcky or shaly rock.

The foregoing and other objects of the invention will hereinafter bemore fully described and claimed and illustrated in the drawings forminga part of this specification in which like characters of referenceindicate corresponding parts in all the views, and in which Figure 1 isa side elevation of a preferred form of the invention; Fig. 2 is a topview of the same; and Fig. 3 is a transverse section on the line 3-3 ofFig. 1.

The several parts of the device may be made of any suitable materials,and the relative sizes and proportions, as well as the general design ofthe mechanism, may be varied to a considerable extent without departingfrom the spirit of the invention hereinafter more fully set forth andspecifically claimed. r

I show at 10 a drill bit of the fishtail type having cutting edges orpoints 11 at its lower end. At the upper end I provide a shank 12 havingone or more, shown as two, diagonally arranged bores 13 extending fromthe top thereof downwardly into' the side wings 14 of the bit. Saidshank is'prom drill bit is adapted to be rotated in the direction of thearrow, Fig. 2, and upon the advancing face of each wing 14 is arranged atubular discharge means for the water conveyed through the correspondingbore 13. Said means comprises a tube 15 preferably cast integrally uponsaid advancing'face and providing a bore 15 communicating with the lowerend of the adjacent bore 13. The lower open end of the tube 15 islocated at a suitable distance above the cutting edge 11 of said wing,two purposes being subserved by such arrangement; first, water forceddownwardly through the bores 13 and 15 will be discharged directly uponthe active face of the wing serving to keep such wing flushed clean withrespect to any accumulation of sticky earth or rock which would tend toclog up the device, and sec ondly, by locating the end of the tube atsome distance above the cutting edge {11, I am enabled to resharpen thedrill asmay .be required without interfering with. the function oraction of the water tube mechanism.

I am aware that it has been. proposed heretofore in devices of thisgeneral char actor to deliver a stream of water along the center of adrill bit, but such arrangement can not be depended upon for the mostexpeditious and satisfactory operation in all kinds of earth and rockwhich are repeatedly being encountered in deep well operations.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. In a device of the character set forth, a deep welldrill bit including a shank and apair of laterally projecting wingsterminating in cutting edges, said drill bit being provided with meansto deliver water under force diagonally through the stem and deliven itupon the advancing face of each wing above the lower cutting edgethereof whereby said face is kept flushed clean of vided with a screwthread for connection sticky material.

2. The herein described deep well drill bit comprising a shank andintegral wings terminating in cutting edges, said shank being providedwith diagonally arranged bores leading from the upper end of the shankdownwardly and laterally into said wings, the advancing face of eachWing being provided with an integral tubular member having a verticalbore constituting a continuation of the adjacent diagonal shankbore,'the lower end of the tubular member being located above thecutting edge of such wing.

' In testimony whereof I have signed my name to this specification inthe presence of two subscribing witnesses.

WILLIAM M. KECK. Witnesses:

C. W. USHER, v JOHN K. COLLINS.

